.card-padding{
    padding: 40px;
}
.card-color{
    margin: 10px;
    padding: 10px;
    opacity:0.6;
    filter:alpha(opacity=60); /* IE8 及更早版本 */
}
.first>.card-body {
    -ms-flex: 1 1 auto;
    flex: 1 1 auto;
    min-height: 1px;
    padding: 0;
}
.second{
    background-image: url(../images/yuecai_secondbg.jpeg);
    background-repeat: no-repeat;
    min-height: 500px;
}
.jumbotron {
    padding: 2rem 1rem;
    margin-bottom: 2rem;
    background-color: #e9ecef;
    opacity:0.4;
    border-radius: 0.3rem;
}
.third{
    padding-top: 20px;
}